Peter Woit: The Forgotten Geometry That Could Unify Physics

I personally subscribe to The Economist. TOE listeners get 35% off the annual subscription. No other podcast has this! https://economist.com/TOE Peter Woit (Columbia senior lecturer, *Not Even Wrong*) on GUT/string failures and a 4D spinor/Wick-rotation approach.

0:00 Introduction
1:31 Overview of Unification in Physics and the Standard Model
5:11 Historical Development of the Standard Model and its Success
7:00 Introduction to General Relativity and its Challenges
9:32 Unanswered Questions in the Standard Model (SU1, SU2, SU3)
13:12 Technical Issues in Quantum Field Theory and General Relativity
17:24 The Rise of Grand Unified Theories (GUTs)
21:07 Challenges and Failures of GUTs (Proton Decay)
25:43 Abandonment of GUTs and Introduction of Supersymmetry
26:45 Basics of Supersymmetry and Its Predictions
31:28 Failure of Supersymmetry (No Evidence for Superpartners)
32:08 Supergravity, Kaluza-Klein Theories, and Extra Dimensions
35:52 String Theory and the Unification Paradigm in the 1980s
39:00 Experimental Failures and the Lack of Evidence for String Theory
41:00 Ongoing Pursuit of Failed Theories and Resistance to New Ideas
47:09 The Shift in Attitudes Towards Unification Efforts in Physics
48:13 Introduction to Peter Woit's New Ideas on Unification
52:32 The Role of Four-Dimensional Geometry and Spinors in Unification
58:11 Wick Rotation and Differences Between Euclidean and Minkowski Space-Time
1:03:05 Technical Challenges in Wick Rotation and Quantum Field Theory
1:09:01 Unique Aspects of Spinors in Euclidean vs. Minkowski Space-Time
1:14:38 The Dirac Operator and its Role in Space-Time Symmetry
1:18:02 Relation to Supersymmetry and the Right-Handed Nature of Space-Time
1:22:04 Connection to Gravity and Loop Quantum Gravity (Ashtakar Variables)
1:23:04 Outro / Support TOE

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RESOURCES:

- Peter Woit’s prior TOE appearance: https://www.youtube.com/watch?v=9z3JYb_g2Qs
- Peter Woit, Quantum Theory and Representations: https://www.amazon.com/Quantum-Theory-Groups-Representations-Introduction/dp/3319646109
- Peter Woit’s Papers - https://inspirehep.net/literature?sort=mostrecent&size=25&page=1&q=a%20P.Woit.1
- Peter Woit’s Blog - https://www.math.columbia.edu/~woit/wordpress/
- Peter Woit, “Not Even Wrong”: https://amzn.to/3X8c1pS
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Theories of Everything with Curt Jaimungal features long-form, technically detailed interviews with leading researchers in physics, mathematics, consciousness, and philosophy, exploring topics at the level of active research. For academics, graduate students, and anyone seeking depth beyond popular science.

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